Someone with more legal knowledge can give better advice than me on this, but if I were you, I would document every time you try to reach or whatnot. What if she comes back in three years, says you are the father, demands a paternity test, and then three years of back pay in child support? You want to be able to tell the court that you did everything possible to find out if the child was yours. I know it's tough to think this way when the pain is still so present and so recent, but you have to protect yourself.